5Q or 5-Q may refer to:
5Q, IATA code for Holiday Europe 5Q, former IATA code for Best Air 5Q, former IATA code for Euroceltic Airways 5q, an arm of Chromosome 5 (human) Chromosome 5q deletion syndrome 5q- syndrome; see Myelodysplastic syndrome AD-5Q, a model of Douglas A-1 Skyraider 5Q, designation for one of the Qumran Caves MD 5Q, a section of Maryland Route 5 5Q, the production code for the 1980 Doctor Who serial Meglos
See also Q5 (disambiguation)